CN108318995A - A kind of lens system and camera lens - Google Patents
A kind of lens system and camera lens Download PDFInfo
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- CN108318995A CN108318995A CN201810048398.4A CN201810048398A CN108318995A CN 108318995 A CN108318995 A CN 108318995A CN 201810048398 A CN201810048398 A CN 201810048398A CN 108318995 A CN108318995 A CN 108318995A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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Abstract
The present invention provides a kind of lens system and camera lens, it be positive the first lens group, aperture diaphragm and focal power is positive the second lens group which along optical axis is equipped with focal power successively from the object side to image side；First lens group includes successively from the object side to image side along optical axis：Focal power is negative the first lens, focal power is negative the second lens, focal power is positive the first sub-lens group, focal power is positive or negative the second sub-lens group, focal power is positive third sub-lens group；Wherein, first lens are the meniscus lens convex surface facing object side, and second lens are the meniscus lens convex surface facing object side；In the program, under the structure of each lens and lens group, focal power, focal length, the cooperation that puts in order, the camera lens of short view distance can be realized under conditions of meeting big target surface, big field angle.
Description
Technical field
The present invention relates to optical instrument field, more particularly to a kind of lens system and camera lens.
Background technology
In safety-security area, web camera is the commonly used equipment in safety-protection system, and camera lens is the main of web camera
Composition part, lens performance directly affect image quality and visual field, are constantly carried with the technical indicator demand of safety-protection system
Height begins to use the image-forming component of big target surface (3/4 inch) to enhance image quality on video camera, but this requires lens imagings
Area is also required to be adapted with big target surface image-forming component, when lens imaging area increases, to the spherical aberration of camera lens, coma, master
Beam projecting angle (CRA), higher requirements are also raised for chromatic aberration correction ability.
Currently, camera lens is under conditions of meeting big target surface (3/4 inch), viewpoint for existing wide-angle (having big field angle)
Distance (view distance is distance of the viewpoint position apart from lens apex, viewpoint position be with the light of maximum field of view's angle incidence and
The intersection position of camera lens optical axis) it is usually longer, near the diameter of the minute surface of the lens of object side in view distance and lens system
Directly proportional to the ratio of radius of curvature, the usual ratio is more than 1, and the long guarantor that can be caused in video camera before camera lens of view distance
It protects glass or reflection unit is oversized, lead to that cost is significantly increased or even structure cannot achieve.As shown in Figure 1, camera lens S1
The distance of viewpoint position A1 to the lens apex is H1 (i.e. the view distance of camera lens S1 is H1), and the viewpoint position A2 of camera lens S2 is arrived
The distance of the lens apex is H2 (i.e. the view distance of camera lens S2 is H2), H2>H1 is located at the protective glass before camera lens S2 or anti-
1 size L2 of injection device is more than the 1 size L1 of protective glass or reflection unit before being located at camera lens S1.
Based on this, research and development are a under conditions of meeting big target surface, big field angle, and the short camera lens of view distance just seems very
It is necessary to.
Invention content
An embodiment of the present invention provides a kind of lens system and camera lenses, in the condition for meeting big target surface, big field angle
Under, realize the camera lens of short view distance.
A kind of lens system provided in an embodiment of the present invention, it is just to be equipped with focal power successively from the object side to image side along optical axis
The first lens group, aperture diaphragm and focal power be the second positive lens group；
First lens group includes successively from the object side to image side along optical axis：Focal power is the first lens born, light focus
Degree for the second negative lens, focal power is positive the first sub-lens group, focal power is positive or negative the second sub-lens group, focal power
For positive third sub-lens group；Wherein, first lens are the meniscus lens convex surface facing object side, and second lens are convex
Facing towards the meniscus lens of object side；
Also, each lens meet the following conditions：
D1/R1≤0.73；
R1/f≥6；
Wherein, D1Indicate the diameter of minute surface of first lens close to object side, R1Indicate first lens close to object side
Minute surface radius of curvature, f indicates the focal length of the lens system.
Preferably, it is positive the third lens that the first sub-lens group, which includes focal power,；Wherein, the third lens are convex
Facing towards the meniscus lens of image side.
Preferably, the second sub-lens group includes successively from the object side to image side along optical axis：Focal power is the 4 born
Lens and focal power are the 5th positive lens；Wherein, the 4th lens are biconcave lens, and the 5th lens are lenticular
Mirror.
Preferably, the 4th lens and the 5th lens gluing constitute glued microscope group.
Preferably, it is the 6th positive lens that the third sub-lens group, which includes focal power,；Wherein, the 6th lens are court
To the planoconvex spotlight that the surface of image side is plane, convex surface facing the meniscus lens or biconvex lens of object side.
Preferably, second lens group includes successively from the object side to image side along optical axis：Focal power is the positive the 7th saturating
Mirror, focal power are negative the 8th lens, focal power is positive the 9th lens, focal power is that negative the tenth lens and focal power are just
The 4th sub-lens group；Wherein, the 7th lens are convex surface facing the meniscus lens of image side, biconvex lens or towards object side
Surface is the planoconvex spotlight of plane, and the 8th lens are the meniscus lens convex surface facing image side, and the 9th lens are biconvex
Lens, the tenth lens are biconcave lens.
Preferably, the 4th sub-lens group includes successively from the object side to image side along optical axis：Focal power is the positive the tenth
One lens and focal power are the 12nd positive lens；Wherein, the 11st lens are biconvex lens, convex surface facing the curved of image side
Month lens or towards object side surface be plane planoconvex spotlight.
Preferably, the 12nd lens be biconvex lens or towards image side surface be plane planoconvex spotlight.
Preferably, the 7th lens and the 8th lens gluing constitute glued microscope group.
Preferably, the 9th lens and the tenth lens gluing constitute glued microscope group.
Preferably, the 7th lens and the 9th lens meet condition：0.015≤Nd7/Vd7≤Nd9/Vd9≤
0.025；Wherein, Nd7Indicate the refractive index of the glass material of the 7th lens, Vd7Indicate the glass material of the 7th lens
Abbe number, Nd9Indicate the refractive index of the glass material of the 9th lens, Vd9Indicate the glass material of the 9th lens
Abbe number.
Preferably, the refractive index N of the glass material of the tenth lensd10Meet condition：1.94≤Nd10≤2.05。
Preferably, the focal length f of the 9th lens9With the focal length f of the tenth lens10Meet condition：1.55≤|f9/
f10|≤1.75。
The embodiment of the present invention additionally provides a kind of camera lens, includes successively from the object side to image side along optical axis：The present invention is arbitrary
The lens system and imaging surface that embodiment provides.
Preferably, the camera lens further includes：The optical filter being set between the lens system and the imaging surface.
The embodiment of the present invention has the beneficial effect that：
In lens system provided in an embodiment of the present invention and camera lens, in the structure of each lens and lens group, focal power, coke
Away under, the cooperation that puts in order, the camera lens of short view distance can be realized under conditions of meeting big target surface, big field angle.
Description of the drawings
Fig. 1 is the relation schematic diagram of view distance and video camera size；
Fig. 2 (a) is the structural schematic diagram of the first lens system provided in an embodiment of the present invention；
Fig. 2 (b) is the structural schematic diagram of second of lens system provided in an embodiment of the present invention；
Fig. 2 (c) is the structural schematic diagram of the third lens system provided in an embodiment of the present invention；
Fig. 2 (d) is the structural schematic diagram of the 4th kind of lens system provided in an embodiment of the present invention；
Fig. 2 (e) is the structural schematic diagram of the 5th kind of lens system provided in an embodiment of the present invention；
Fig. 2 (f) is the structural schematic diagram of the 6th kind of lens system provided in an embodiment of the present invention；
Fig. 2 (g) is the structural schematic diagram of the 7th kind of lens system provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of camera lens provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another camera lens provided in an embodiment of the present invention；
The one of the optical transfer function (MTF) of visible light part when the camera lens room temperature that Fig. 5 provides for the embodiment of the present invention one
Kind curve graph；
The optical transfer function (MTF) of visible light part is another when the camera lens room temperature that Fig. 6 provides for the embodiment of the present invention one
A kind of curve graph；
Optical transfer function (MTF) curve of visible light part when Fig. 7 is -30 DEG C of the camera lens that provides of the embodiment of the present invention one
Figure；
Optical transfer function (MTF) curve of visible light part when Fig. 8 is 80 DEG C of the camera lens that provides of the embodiment of the present invention one
Figure；
Fig. 9 is the curvature of field figure for the camera lens visible light part that the embodiment of the present invention one provides；
Figure 10 is the distortion figure for the camera lens visible light part that the embodiment of the present invention one provides；
The one of the optical transfer function (MTF) of visible light part when Figure 11 is camera lens room temperature provided by Embodiment 2 of the present invention
Kind curve graph；
The optical transfer function (MTF) of visible light part is another when Figure 12 is camera lens room temperature provided by Embodiment 2 of the present invention
A kind of curve graph；
The optical transfer function (MTF) of visible light part is bent when Figure 13 is -30 DEG C of camera lens provided by Embodiment 2 of the present invention
Line chart；
Optical transfer function (MTF) curve of visible light part when Figure 14 is 80 DEG C of camera lens provided by Embodiment 2 of the present invention
Figure；
Figure 15 is the curvature of field figure of camera lens visible light part provided by Embodiment 2 of the present invention；
Figure 16 is the distortion figure of camera lens visible light part provided by Embodiment 2 of the present invention.
Specific implementation mode
An embodiment of the present invention provides a kind of lens system and camera lenses, in the condition for meeting big target surface, big field angle
Under, realize the camera lens of short view distance.
A kind of lens system provided in an embodiment of the present invention, it is just to be equipped with focal power successively from the object side to image side along optical axis
The first lens group, aperture diaphragm and focal power be the second positive lens group；
First lens group includes successively from the object side to image side along optical axis：Focal power is the first lens born, light focus
Degree for the second negative lens, focal power is positive the first sub-lens group, focal power is positive or negative the second sub-lens group, focal power
For positive third sub-lens group；Wherein, first lens are the meniscus lens convex surface facing object side, and second lens are convex
Facing towards the meniscus lens of object side；
Also, each lens meet the following conditions：
D1/R1≤0.73；
R1/f≥6；
Wherein, D1Indicate the diameter of minute surface of first lens close to object side, R1Indicate first lens close to object side
Minute surface radius of curvature, f indicates the focal length of the lens system.
It, can under the structure of each lens and lens group, focal power, focal length, the cooperation that puts in order in the embodiment of the present invention
Under conditions of meeting big target surface, big field angle, to realize the camera lens of short view distance.
On the basis of meeting the parameter request of the above optical system, the structure of each lens group can be had as needed
The adjustment of body, is with reference to the accompanying drawings of the specification described in further detail the embodiment of the present invention.
It is a kind of structural schematic diagram of lens system provided in an embodiment of the present invention as shown in Fig. 2 (a).The lens system,
It is positive that be equipped with focal power successively from the object side to image side along optical axis, which be positive the first lens group 1, aperture diaphragm 2 and focal power,
Two lens groups 3.
As shown in Fig. 2 (a), the first lens group 1 includes successively from the object side to image side along optical axis：Focal power is first born
Lens 11, focal power are negative the second lens 12, focal power is positive the first sub-lens group, focal power is negative the second sub-lens
Group, focal power are positive third sub-lens group；Wherein, the first lens 11 are the meniscus lens convex surface facing object side, the second lens
12 be the meniscus lens convex surface facing object side.Certainly, the focal power of the second sub-lens group may be the just embodiment of the present invention pair
This is not defined.
As shown in Fig. 2 (a), the first sub-lens group includes that focal power is positive the third lens 13；Wherein, the third lens 13 are
Convex surface facing the meniscus lens of image side.
As shown in Fig. 2 (a), the second sub-lens group includes successively from the object side to image side along optical axis：Focal power is negative the
Four lens 14 and focal power are the 5th positive lens 15；Wherein, the 4th lens 14 are biconcave lens, and the 5th lens 15 are lenticular
Mirror.
As shown in Fig. 2 (a), third sub-lens group includes that focal power is the 6th positive lens 16；Wherein, the 6th lens 16 are
Surface towards image side is the planoconvex spotlight of plane.
As shown in Fig. 2 (a), the second lens group includes successively from the object side to image side along optical axis：Focal power is the positive the 7th
Lens 17, focal power are negative the 8th lens 18, focal power is positive the 9th lens 19, focal power is negative 20 and of the tenth lens
Focal power is the 4th positive sub-lens group；Wherein, the 7th lens 17 are the meniscus lens convex surface facing image side, and the 8th lens 18 are
Convex surface facing the meniscus lens of image side, the 9th lens 19 are biconvex lens, and the tenth lens 20 are biconcave lens.Above-mentioned aperture diaphragm
2 between the 6th lens 16 and the 7th lens 17.
As shown in Fig. 2 (a), the 4th sub-lens group includes successively from the object side to image side along optical axis：Focal power is positive the
11 lens 21 and focal power are the 12nd positive lens 22；Wherein, the 11st lens 21 are biconvex lens, the 12nd lens 22
For biconvex lens.
Also, each lens meet the following conditions：
D1/R1≤0.73；
R1/f≥6；
Wherein, D1Indicate the first lens 11 close to the diameter of the minute surface of object side, R1Indicate mirror of first lens 11 close to object side
The radius of curvature in face, f indicate the focal length of said lens system.
In a better embodiment, above-mentioned 0.62≤D1/R1≤0.73；6≤R1/f≤8。
In a better embodiment, in order to effectively reduce system aberration, the 7th lens 17 and the 9th lens 19 meet
Condition：0.015≤Nd7/Vd7≤Nd9/Vd9≤0.025；Wherein, Nd7Indicate the refractive index of the glass material of the 7th lens 17, Vd7
Indicate the Abbe number of the glass material of the 7th lens 17, Nd9Indicate the refractive index of the glass material of the 9th lens 19, Vd9Indicate the
The Abbe number of the glass material of nine lens 19.
In a better embodiment, in order to reduce the overall length of system, the refraction of the glass material of the tenth lens 20
Rate Nd10Meet condition：1.94≤Nd10≤2.05。
In a better embodiment, in order to reach the confocal effect of good high/low temperature, the focal length f of the 9th lens 199With
The focal length f of tenth lens 2010Meet condition：1.55≤|f9/f10|≤1.75。
In a better embodiment, as shown in Fig. 2 (a), the 4th lens 14 and the glued mirror of the glued composition of the 5th lens 15
Group.
In a better embodiment, as shown in Fig. 2 (a), the 7th lens 17 and the glued mirror of the glued composition of the 8th lens 18
Group.
In a better embodiment, as shown in Fig. 2 (a), the 9th lens 19 and the glued mirror of the glued composition of the tenth lens 20
Group.
It should be noted that the lens in above-mentioned gluing microscope group can also be only close together, and without gluing, above-mentioned gluing
Microscope group can be one of which or multigroup gluing, and the embodiment of the present invention is to this without limiting.
As shown in Fig. 2 (b), the 6th lens 16 can also be the meniscus lens convex surface facing object side in third sub-lens group,
The 7th lens 17 can also be biconvex lens in second lens group.
As shown in Fig. 2 (c), the 6th lens 16 can also be biconvex lens in third sub-lens group.
As shown in Fig. 2 (d), in the second lens group the 7th lens 17 can also be towards object side surface be plane plano-convex
Lens.
As shown in Fig. 2 (e), the 11st lens 21 can also be that the bent moon convex surface facing image side is saturating in the 4th sub-lens group
Mirror.
It is plane that the 11st lens 21, which can also be towards the surface of object side, as shown in Fig. 2 (f), in the 4th sub-lens group
Planoconvex spotlight.
It is plane that the 12nd lens 22, which can also be towards the surface of image side, as shown in Fig. 2 (g), in the 4th sub-lens group
Planoconvex spotlight.
Optionally, it is positive that the first sub-lens group, which can also be negative biconcave lens and a focal power for a focal power,
The lens group of biconvex lens gluing.
Optionally, the second sub-lens group can also be substituted by meniscus lens, wherein meniscus lens convex surface facing image side.
Optionally, it is positive that third sub-lens group, which can also be negative meniscus lens and a focal power for a focal power,
The lens group of planoconvex spotlight gluing, wherein meniscus lens convex surface facing object side, the surface of planoconvex spotlight towards image side is flat
Face.
In short, in embodiments of the present invention, the first sub-lens group, the second sub-lens group and third sub-lens group either
Single lens can also be by the lens group of lens gluing.
Optionally, the 4th sub-lens group can also be that positive biconvex lens is substituted by focal power.
It should be pointed out that in the embodiment of the present invention, if without particularly pointing out, refractive index all refer to optical glass material relative to
The refractive index (refractive index of the optical glass material obtained by d flash rangings) of d light, Abbe number all refers to optical glass material relative to d
The Abbe number (Abbe number obtained with the refractive index of the optical glass material obtained by d flash rangings) of light.Wherein, d light representations wavelength
For the sodium yellow light of 589.3nm.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of camera lens, along optical axis from the object side to image side according to
It is secondary to include：The lens system and imaging surface 24 that any embodiment of the present invention provides.Two of which structural schematic diagram respectively as Fig. 3,
Shown in Fig. 4, Fig. 3 includes lens system shown in Fig. 2 (a), and Fig. 4 includes lens system shown in Fig. 2 (b).
In a better embodiment, in order to reduce colour cast, as shown in Figure 3, Figure 4, which can also include：It is set to
Optical filter 25 between zoom-lens system and imaging surface 24.
Due to the camera lens of the embodiment of the present invention, using above-mentioned lens system, aberration is corrected well, image planes size
(14.7mm) greatly, imaging resolution is high (highest supports 12,000,000 pixel camera machines), and field angle is big, and view distance is short, and (first thoroughly
Diameter D of the mirror close to the minute surface of object side1With radius of curvature R1Ratio be less than 0.73), image quality is excellent.
Two preferred embodiments are enumerated below to understand camera lens provided in an embodiment of the present invention to facilitate.
Embodiment one：
In specific implementation process, the minute surface of each lens in camera lens shown in Fig. 3 along optical axis from the object side to image side
Radius of curvature R, center thickness Tc (i.e. the distance of adjacent mirror facets central point), refractive index Nd, Abbe number Vd, minute surface diameter D and
Focal length f meets the condition listed by table 1：
Table 1
Wherein, STO indicates that aperture diaphragm, Infinity indicate infinitely great；From the object side to image side along optical axis, the mirror of lens
Face is arranged in order, such as：The minute surface of lens 11 is minute surface 1 and minute surface 2, and the minute surface of lens 12 is minute surface 3 and minute surface 4, lens 13
Minute surface be minute surface 5 and minute surface 6, and so on, since lens 14 and lens 15 are glued together, lens 14 and lens 15
Cemented surface be same minute surface (i.e. minute surface 8), other cemented surfaces are also similar, in table one R1 expression minute surface 1 radius of curvature, T1
Indicate that the distance of minute surface 1 and 2 central point of minute surface, n1 indicate refractive index of the optical glass material of minute surface 1 relative to d light, V1 tables
Show that Abbe number of the optical glass material of minute surface 1 relative to d light, D1 indicate that the diameter of minute surface 1, f1 indicate the focal length of lens 11,
Other parameters in table one can and so on its meaning, details are not described herein.
It can be obtained by the data of table 1：
The focal length f of lens system is：4.81mm；
D1/R1=23.233/33.3=0.698；
R1/ f=33.3/4.81=6.923；
Nd7/Vd7=1.497/81.608=0.018；
Nd9/Vd9=1.593/67.002=0.024；
The refractive index N of the glass material of tenth lensd10For：2.003；
The focal length f9 of 9th lens is：14.056, the focal length f10 of the tenth lens are：- 8.608, therefore, | f9/f10 |=|
14.056/ (- 8.608) |=1.633.
The focal power for the balsaming lens group that 4th lens and the 5th lens are constituted is negative.
It is noted that the camera lens of the embodiment of the present invention one has following optical technology index：
Lens focus f：4.81mm；
The field angle of camera lens：190°；
The F Theta distortion of camera lens：- 8%；
The aperture (F/#) of lens system：2.0；
Camera lens image planes size：14.7mm.
Detailed Optical system is carried out below by the embodiment of the present invention one, is further described the embodiment of the present invention
One lens system provided and camera lens.
Optical transfer function be for evaluating the mode that the image quality of an optical system is more accurate, intuitive and common,
Its curve is higher, more smooth, shows that the image quality of system is better, (such as to various aberrations：Spherical aberration, coma, astigmatism, the curvature of field, axis
To aberration, chromatic longitudiinal aberration etc.) carry out good correction.
As shown in Figure 5, Figure 6, the one of the optical transfer function (MTF) of visible light part when Fig. 5 is camera lens room temperature (20 DEG C)
Kind curve graph, another curve graph of the optical transfer function (MTF) of visible light part when Fig. 6 is camera lens room temperature (20 DEG C).From
It is found that optical transfer function (MTF) curve graph of the camera lens visible light part is smoother, concentrates in Fig. 5, and in 100lp/mm
When to still ensure that full filed MTF average values reach in 0.4 or more, Fig. 6 abscissa be field angle, ordinate MTF, curve is from a left side
To right representative from center to the variation tendency of edge imaging quality, wherein the MTF curve that S3, T3 are generated when being 60lp/mm, S4,
The MTF curve that T4 is generated when being 100lp/mm, the MTF curve that S5, T5 are generated when being 160lp/mm, as can be known from Fig. 6, the camera lens
Optical transfer function (MTF) curve graph of visible light part is smoother, concentrates；It can be seen that the camera lens that the present embodiment one provides, it can be with
Reach very high resolution ratio, meets the imaging requirements of 12,000,000 pixel camera machines.
As shown in Figure 7, Figure 8, the optical transfer function (MTF) of visible light part is bent when Fig. 7 is camera lens -30 degrees Celsius (DEG C)
Line chart, optical transfer function (MTF) curve graph of visible light part when Fig. 8 is camera lens+80 degrees Celsius (DEG C).As can be known from Fig. 7,
At -30 DEG C, optical transfer function (MTF) curve graph of the camera lens visible light part is smoother, concentrates, and in 100lp/mm
When still ensure that full filed MTF average values reach 0.3 or more, as can be known from Fig. 8, at 80 DEG C, the camera lens visible light part
Optical transfer function (MTF) curve graph is smoother, concentrates, and still ensures that full filed MTF average values reach in 100lp/mm
It to 0.4 or more, can be seen that by Fig. 5, Fig. 7, Fig. 8, at -30 DEG C~80 DEG C, the camera lens that the present embodiment one provides remains to operating temperature
It is still clear with when room temperature to ensure to be imaged without re-focusing.
The corresponding curvature of field figure of camera lens visible light part is made of three curve T and three curve S；Wherein, three T points of curves
Not Biao Shi the corresponding meridional beam (Tangential Rays) of three kinds of wavelength (486nm, 587nm and 656nm) aberration, three
Curve S indicates the picture of the corresponding sagittal beam (Sagittial Rays) of three kinds of wavelength (486nm, 587nm and 656nm) respectively
Difference, meridianal curvature of field value and Sagittal field curvature value are smaller, illustrate that image quality is better.As shown in figure 9, the meridianal curvature of field value control of camera lens
Within the scope of -0.018~0.067mm, Sagittal field curvature value controls within -0.016~0.067mm ranges.
The corresponding F Theta distortion figures of camera lens visible light part, for curve closer to y-axis, aberration rate is smaller in figure.Such as Figure 10
Shown, wherein optical distortion rate control is within -8%~0 range.
Embodiment two：
In specific implementation process, the minute surface of each lens in camera lens shown in Fig. 4 along optical axis from the object side to image side
Radius of curvature R, center thickness Tc, refractive index Nd, Abbe number Vd, minute surface diameter D and focal length f meet the condition listed by table 2：
Table 2
It can be obtained by the data of table 2：
The focal length f of lens system is：4.85mm；
D1/R1=21.303/29.723=0.717；
R1/ f=29.723/4.85=6.128；
Nd7/Vd7=1.437/95.1=0.015；
Nd9/Vd9=1.593/68.624=0.023；
The refractive index N of the glass material of tenth lensd10For：1.946；
The focal length f9 of 9th lens is：13.576, the focal length f10 of the tenth lens are：- 8.131, therefore, | f9/f10 |=|
13.576/ (- 8.131) |=1.67.
The focal power for the balsaming lens group that 4th lens and the 5th lens are constituted is just.
It is noted that the camera lens of the embodiment of the present invention two has following optical technology index：
Lens focus f：4.85mm；
The field angle of camera lens：190°；
The F Theta distortion of camera lens：- 7%；
The aperture (F/#) of lens system：2.0；
Camera lens image planes size：14.7mm.
Detailed Optical system is carried out below by the embodiment of the present invention two, is further described the embodiment of the present invention
Two lens systems provided and camera lens.
As shown in Figure 11, Figure 12, the optical transfer function (MTF) of visible light part when Figure 11 is camera lens room temperature (20 DEG C)
A kind of curve graph, another curve graph of the optical transfer function (MTF) of visible light part when Figure 12 is camera lens room temperature (20 DEG C).
As can be known from Fig. 11, optical transfer function (MTF) curve graph of the camera lens visible light part is smoother, concentrates, Er Qie
It is field angle to still ensure that full filed MTF average values reach abscissa in 0.3 or more, Figure 12 when 100lp/mm, and ordinate is
MTF, curve represent the variation tendency from center to edge imaging quality from left to right, wherein S3, T3 are generated when being 60lp/mm
MTF curve, the MTF curve that generates when S4, T4 are 100lp/mm, the MTF curve that S5, T5 are generated when being 160lp/mm, from figure
It is found that optical transfer function (MTF) curve graph of the camera lens visible light part is smoother, concentrates in 12；It can be seen that the present embodiment two
The camera lens of offer can reach very high resolution ratio, meet the imaging requirements of 12,000,000 pixel camera machines.
As shown in Figure 13, Figure 14, the optical transfer function of visible light part when Figure 13 is camera lens -30 degrees Celsius (DEG C)
(MTF) curve graph, optical transfer function (MTF) curve graph of visible light part when Figure 14 is camera lens+80 degrees Celsius (DEG C).From figure
In 13 it is found that at -30 DEG C, optical transfer function (MTF) curve graph of the camera lens visible light part is smoother, concentrates, and
Still ensure that full filed MTF average values reach 0.3 or more in 100lp/mm, as can be known from Fig. 14, at 80 DEG C, which can
Optical transfer function (MTF) curve graph of light-exposed part is smoother, concentrates, and still ensures that full filed in 100lp/mm
MTF average values reach 0.3 or more, can be seen that by Figure 11, Figure 13, Figure 14, and operating temperature is at -30 DEG C~80 DEG C, the present embodiment two
The camera lens of offer still ensure that be imaged without re-focusing it is still clear with when room temperature.
The corresponding curvature of field figure of camera lens visible light part is made of three curve T and three curve S；Wherein, three T points of curves
Not Biao Shi the corresponding meridional beam (Tangential Rays) of three kinds of wavelength (486nm, 587nm and 656nm) aberration, three
Curve S indicates the picture of the corresponding sagittal beam (Sagittial Rays) of three kinds of wavelength (486nm, 587nm and 656nm) respectively
Difference, meridianal curvature of field value and Sagittal field curvature value are smaller, illustrate that image quality is better.As shown in figure 15, the meridianal curvature of field value control of camera lens
Within the scope of -0.018~0.08mm, Sagittal field curvature value controls within -0.016~0.08mm ranges system.
The corresponding F Theta distortion figures of camera lens visible light part, for curve closer to y-axis, aberration rate is smaller in figure.Such as Figure 16
Shown, wherein optical distortion rate control is within -7%~0 range.
In conclusion an embodiment of the present invention provides a kind of lens system and camera lens, using 12 specific structure shapes
Optical lens, and be arranged in order in sequence from object side to image side, and the focal power by each optical lens distribution,
Simultaneously using adaptable optical glass material so that the planform of camera lens, power of lens distribution, the refractive index of lens,
The parameters such as Abbe number are matched with image-forming condition, and then make spherical aberration, coma, astigmatism, the curvature of field, chromatic longitudiinal aberration, the axial chromatic aberration of camera lens
It is corrected well, to realize big target surface, short view distance, high-resolution bugeye lens, and edge image pressure
Contracting is slight, the characteristics of can be good at restoring visions of reality；Camera lens athermal is realized simultaneously, in the environment of -30 DEG C~80 DEG C
Using that will not run coke, camera lens need not re-focuse it is ensured that imaging clearly when variation of ambient temperature；All
Optical lens is all made of glass spherical design, and cold machining process is functional, and production cost is low.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (15)
1. a kind of lens system, which is characterized in that it is positive first saturating to be equipped with focal power successively from the object side to image side along optical axis
Microscope group, aperture diaphragm and focal power are the second positive lens group；
First lens group includes successively from the object side to image side along optical axis：Focal power is negative the first lens, focal power is
Negative the second lens, focal power are positive the first sub-lens group, focal power is positive or negative the second sub-lens group, focal power is just
Third sub-lens group；Wherein, first lens are the meniscus lens convex surface facing object side, and second lens are convex surface court
To the meniscus lens of object side；
Also, each lens meet the following conditions：
D1/R1≤0.73；
R1/f≥6；
Wherein, D1Indicate the diameter of minute surface of first lens close to object side, R1Indicate mirror of first lens close to object side
The radius of curvature in face, f indicate the focal length of the lens system.
2. lens system as described in claim 1, which is characterized in that the first sub-lens group includes that focal power is positive the
Three lens；Wherein, the third lens are the meniscus lens convex surface facing image side.
3. lens system as claimed in claim 2, which is characterized in that the second sub-lens group is along optical axis from object side to picture
Side includes successively：Focal power is that negative the 4th lens and focal power are positive the 5th lens；Wherein, the 4th lens are concave-concave
Lens, the 5th lens are biconvex lens.
4. lens system as claimed in claim 3, which is characterized in that the 4th lens and the 5th lens gluing are constituted
Glued microscope group.
5. lens system as claimed in claim 3, which is characterized in that the third sub-lens group includes that focal power is positive the
Six lens；Wherein, it is that the planoconvex spotlight of plane, the bent moon convex surface facing object side are saturating that the 6th lens, which are towards the surface of image side,
Mirror or biconvex lens.
6. lens system as described in any one in claim 1-5, which is characterized in that second lens group is along optical axis from object
Side includes successively to image side：Focal power is positive the 7th lens, focal power is negative the 8th lens, focal power is the positive 9th thoroughly
Mirror, focal power are that negative the tenth lens and focal power are positive the 4th sub-lens group；Wherein, the 7th lens be convex surface facing
The meniscus lens of image side, biconvex lens or planoconvex spotlight that the surface towards object side is plane, the 8th lens are convex surface court
To the meniscus lens of image side, the 9th lens are biconvex lens, and the tenth lens are biconcave lens.
7. lens system as claimed in claim 6, which is characterized in that the 4th sub-lens group is along optical axis from object side to picture
Side includes successively：Focal power is that positive the 11st lens and focal power are positive the 12nd lens；Wherein, the 11st lens
For biconvex lens, the meniscus lens convex surface facing image side or planoconvex spotlight that the surface towards object side is plane.
8. lens system as claimed in claim 7, which is characterized in that the 12nd lens are biconvex lens or towards image side
Surface be plane planoconvex spotlight.
9. lens system as claimed in claim 6, which is characterized in that the 7th lens and the 8th lens gluing are constituted
Glued microscope group.
10. lens system as claimed in claim 6, which is characterized in that the 9th lens and the tenth lens gluing structure
At glued microscope group.
11. lens system as claimed in claim 6, which is characterized in that the 7th lens and the 9th lens meet article
Part：0.015≤Nd7/Vd7≤Nd9/Vd9≤0.025；Wherein, Nd7Indicate the refractive index of the glass material of the 7th lens, Vd7
Indicate the Abbe number of the glass material of the 7th lens, Nd9Indicate the refractive index of the glass material of the 9th lens, Vd9Table
Show the Abbe number of the glass material of the 9th lens.
12. lens system as claimed in claim 6, which is characterized in that the refractive index N of the glass material of the tenth lensd10
Meet condition：1.94≤Nd10≤2.05。
13. lens system as claimed in claim 6, which is characterized in that the focal length f of the 9th lens9With the tenth lens
Focal length f10Meet condition：1.55≤|f9/f10|≤1.75。
14. a kind of camera lens, which is characterized in that include successively from the object side to image side along optical axis：Such as any one of claim 1~13
The lens system and imaging surface.
15. camera lens as claimed in claim 14, which is characterized in that further include：It is set to the lens system and the imaging
Optical filter between face.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445075A (en) * | 2018-12-29 | 2019-03-08 | 深圳市点睛创视技术有限公司 | A kind of Miniature projection lens |
| CN110646927A (en) * | 2019-09-30 | 2020-01-03 | 江西特莱斯光学有限公司 | Super wide angle super large light ring optical lens |
| CN111694135A (en) * | 2020-07-15 | 2020-09-22 | 北创光电科技(邵阳)有限公司 | Big wide angle video camera lens of focus 8mm |
| CN111781714A (en) * | 2020-06-20 | 2020-10-16 | 广东弘景光电科技股份有限公司 | Super wide angle super high pixel optical system |
| CN112817121A (en) * | 2019-11-18 | 2021-05-18 | 成都理想境界科技有限公司 | Projection objective and scanning display device |
| CN112817119A (en) * | 2019-11-15 | 2021-05-18 | 中国科学院长春光学精密机械与物理研究所 | Optical lens for spaceflight |
| CN114488485A (en) * | 2022-02-14 | 2022-05-13 | 合肥埃科光电科技股份有限公司 | Large-target-surface wide-angle low-distortion industrial lens of f22mm |
| WO2023109685A1 (en) * | 2021-12-15 | 2023-06-22 | 东莞市宇瞳汽车视觉有限公司 | Prime lens |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6697202B2 (en) * | 2001-07-12 | 2004-02-24 | Fuji Photo Optical Co., Ltd. | Retrofocus imaging lens |
| CN104220916A (en) * | 2012-04-09 | 2014-12-17 | 富士胶片株式会社 | Image pick-up lens and image pick-up device |
| CN106556920A (en) * | 2015-09-28 | 2017-04-05 | 富士胶片株式会社 | Imaging lens system and camera head |
| JP2017161847A (en) * | 2016-03-11 | 2017-09-14 | 株式会社ニコン | Optical system, optical instrument and method for manufacturing optical system |
-
2018
- 2018-01-18 CN CN201810048398.4A patent/CN108318995B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6697202B2 (en) * | 2001-07-12 | 2004-02-24 | Fuji Photo Optical Co., Ltd. | Retrofocus imaging lens |
| CN104220916A (en) * | 2012-04-09 | 2014-12-17 | 富士胶片株式会社 | Image pick-up lens and image pick-up device |
| CN106556920A (en) * | 2015-09-28 | 2017-04-05 | 富士胶片株式会社 | Imaging lens system and camera head |
| JP2017161847A (en) * | 2016-03-11 | 2017-09-14 | 株式会社ニコン | Optical system, optical instrument and method for manufacturing optical system |
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|---|---|---|---|---|
| CN109445075B (en) * | 2018-12-29 | 2024-04-16 | 深圳市点睛创视技术有限公司 | Miniature projection lens |
| CN109445075A (en) * | 2018-12-29 | 2019-03-08 | 深圳市点睛创视技术有限公司 | A kind of Miniature projection lens |
| CN110646927A (en) * | 2019-09-30 | 2020-01-03 | 江西特莱斯光学有限公司 | Super wide angle super large light ring optical lens |
| CN112817119B (en) * | 2019-11-15 | 2021-11-16 | 中国科学院长春光学精密机械与物理研究所 | Optical lens for spaceflight |
| CN112817119A (en) * | 2019-11-15 | 2021-05-18 | 中国科学院长春光学精密机械与物理研究所 | Optical lens for spaceflight |
| CN112817121A (en) * | 2019-11-18 | 2021-05-18 | 成都理想境界科技有限公司 | Projection objective and scanning display device |
| CN111781714A (en) * | 2020-06-20 | 2020-10-16 | 广东弘景光电科技股份有限公司 | Super wide angle super high pixel optical system |
| CN111781714B (en) * | 2020-06-20 | 2024-04-05 | 广东弘景光电科技股份有限公司 | Ultra-wide-angle ultra-high pixel optical system |
| CN111694135A (en) * | 2020-07-15 | 2020-09-22 | 北创光电科技(邵阳)有限公司 | Big wide angle video camera lens of focus 8mm |
| CN111694135B (en) * | 2020-07-15 | 2024-05-31 | 北创光电科技(邵阳)有限公司 | Large wide-angle video lens with focal length of 8mm |
| WO2023109685A1 (en) * | 2021-12-15 | 2023-06-22 | 东莞市宇瞳汽车视觉有限公司 | Prime lens |
| CN114488485A (en) * | 2022-02-14 | 2022-05-13 | 合肥埃科光电科技股份有限公司 | Large-target-surface wide-angle low-distortion industrial lens of f22mm |
| CN114488485B (en) * | 2022-02-14 | 2023-07-07 | 合肥埃科光电科技股份有限公司 | Large-target-surface wide-angle low-distortion industrial lens with f22mm |
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